Electric lamp making machine



Oct. 27, 1959 w. T. s. wlLTsHlRE ETAL T 2,910,166

ELECTRIC LAMP MAKING MACHINE Fi'led Aug. 26, 1958 l 3 Smets-Sheet l Yigg.

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ITWeIw'It-OTIS: WiLLiam T S. WilftshiT-e, CLaTIeTwce 5. Tevez,

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Oct. 27, 1959 w. T. s. wlLTsHlRE ETAL ELECTRIC LAMP MAKING MACHINE United States Patent() v 2,910,166 ELECTRIC MAKING MACHINE William T. S. Wiltshire, Cleveland, and Clarence S. Tere z, Maple Heights, Ohio, assignors to General Electric Company, a corporation of New York Application August 2-6, k1958, SerialNo. 757,257

8 Claims. (Cl. 198-33) This invention relates generally to electric lamp making machinery comprising a head for holding a lamp bulb and carrying it along a path` of movement along which are located mechanisms for performing various operations on the'lamp bulb.

It is lan object of the invention to provide a head construction of a novel design that will permit a high degree of flexibility in handling the lamps as they are moved along said path of travel.

In a preferred embodiment of the invention, a plurality of. heads are mounted on the links of a chain conveyor and each head comprises a spring-loaded spindle by virtue of which the entire head may be raised or lowered as desired, and xed and movable cooperating holder members one of which is iixedly mounted on said head and the other being spring-loaded for movement in the head relative to the fixed holder member to receive and `claiflp a lamp bulb therebetween. Further, in the pre-- ferred embodiment, a portion of the chain is wrapped around a portion of a turret, and operations requiring precision mechanical performance are done by mechanisms at work stations or positions on the turret where the individual links of the chain can be held most accurately. l Y

A further preferred feature'is the provision of means whereby the -aforesaid holder members are supported on the head for pivotal or tilting movement from an upright to a horizontal position during a portion of the path of travel of the head. 'I'his feature may be employed in a lamp finishing machine for lamps having helically coiled-coil filaments extending axially of the lamp bulb and which are normally held by the head in an upright position with the filaments vertically disposed while they are carried to positions where a base is mounted on the bulb and the lamp lead wires are properly prepared and attached to the base by soldering or welding, after which the lamp is flashed by passing current through the lament. For the ashing operation, it is preferred that the filament be. disposed horizontally and that may be done in the present case without removing the lamp from the machine, by virtue of the tilting feature.

The vertical adjustability of the head may also' be utilized for cooperation with a so-called base plate or holder carried by the turret and which receives the end of the base on the upper end of the lamp bulb carried by the head and projecting upwardly beyond the holders thereon. For this purpose, upon entry of the head into association with the turret, it is depressed, by virtue of the spring-loaded spindle, to bring the lamp base below the level` of the said base' plate, and the headv is then permitted to rise to bring the lamp base into firm engagement with the base plate under the action of the said spring-loaded spindle. The same performance may take place upon departure of the head from association with the turret in order to release the lamp base from engagement with the base plate.

Further features and advantages of our invention will 2,910,166 ICC. vintrested 0er-` 27, '1959 2 appear from the following detailed description of a species thereof, and from the drawings wherein: f

Fig. 1 is ya plan view of the conveyor` portion of a lamp finishing machine; t

Fig. 2 is a perspective view of cooperating heads on a conveyor chain and on a turret around a portion of which the chain is wrapped;

Fig. 3 is a side elevation, partly in section, of a heady on the chain with'the elements of the head as they appear at a lamp loading position or station;y

Fig. 4 is a somewhat diagrammatic perspective view of actuating means for the chain heads at a lamp loading station; t.

Fig. 5 is a side elevation of a chain head at a base threading station; p I

Fig. 6 is a side elevation of chain and turretheads at a base cement baking station; v Y

Fig. 7 is a side elevation of a head at a flashing station with associated head tilting cam means and electrical contact means; p

Fig. 8 is a diagrammatic-development of cam tracks extending around the path of the conveyor chain for actuating the heads thereon; l

Fig. 9 is a fragmentary view, similar to Fig. -8, of a modified portion of the cam tracks; and v Fig. -10 is a perspective view of a bulb holder portion of a head on the conveyor chain.

The conveyor assembly illustrated inlFig. 1 comprises generally a chain assembly indicated at 1, and which travels around a turret 2 and around a generally U-shaped rail member 3. The turret 2 is intermittently rotated on a vertical shaft 4 by suitable conventional indexing means to drive the chain 1 in steps. i

The chain 1 is composed of a plurality of links 5 (Fig. 2) each comprising a central hubportion 6 having an arm 7 extending laterally from the center thereof in one direction, and a pair of spaced arms 8 extending laterally therefrom in the opposite direction. The end of the arm 7 of each link 5 is in alignment and coupled with the ends of the arms 8 of the adjacent link by a pin 9 which is fixed to the arm 7 by a pin 10. lThe chain 1 is supported and maintained a-t the proper height by rollers 11 which are carried by arms 12 fixed to the pins 9 and ywhich ride on the upper surface of the rail 3S. A pair of rollers 13 on each pin 9 roll. along the vertical face of the rail 3 (Fig. 5) which is carried by a stationary frame 14. The curved portion of the rail 3 at the bottom of Fig. 1 is formed from a part of the frame which is made adjustable in known manner to compensate for wear of the chain, and the rail portion thereof comprises a pair ofl flanges 3 (Fig. 3).

The chain is supported on the turret 2 by engagement of the rollers-11 with the upper surface thereof (Figs. 2 and 6) and by engagement of the rollers 13 with arcuate pockets 15 in flange portions 16 of the turret which thereby constitute, in effect, a sprocket; alternate pockets 17 provide for clearance of the hub portions 6 of the chain links. For the entire path of travel of the chain around the rail 3 and turret 2, except around the bend of the rail at the bottom of Fig. 1, it is confined between the rails 3 or pockets 15 on turret 2, on the one hand, and an outer rail orguide member 18 on the other hand. At the area indicated generally at 19 (Fig. 1), the rails 3 and 18 areappropriately curved to guide the chain links into I with the turret 2.

Each of the links 5 carries a head 20 (Figs. 2, 3 and 5 to 7) for supporting a pear-shaped lamp bulb 21 and carrying it around a path of travel along which various operations are performed on the lamp. In the machine illustrated herein, there are sixty-eight heads occupying the positions indicated at PI to P68.' Each of the heads proper engagementk comprises a hollow'vertical spindle 22 which is mountedI for vertical movement in the bore of the chain link hub 6. The spindle 22 is spring-loaded by virtue of a helical compression spring 23 (Fig. 3) located in the interior of the spindle between its upper end and a retainer member 24 which is fastened to the bottom of the hub 6 and has a rectangular center portion 25 projecting into the interior of the spindle throughV a slot 26 in its wall; the said center portion 25 makes a close sliding iit with the sides of the slot 26 and thereby'prevents rotation of the spindle.

The head 20 also comprises a lamp holder cup 27 for supporting the lamp bulb by its spherical lower end. The holder 27 comprises a partially ring-shaped portion 28 (Fig. 2) extending around a little more than 180 and which maybe provided with three pads or bosses 29 for engaging the bulb surface. The holder cup 27 i's-mounted on ahollow vertical post 30 which is secured at its lower end to one end of a lever 31 which is pivotally mounted at its other end on a pin or shaft 32 carried by a bracket 31 which is fixed to the upper end of the spindle 22. The post 30 is normally maintained in proper vertical position by engagement of an adjustable stop screw 33 in lever 31 with a bossor lug 34 projecting from the back of bracket 31.

For clamping the lamp bulb 21 in the holder cup 27, there is provided a supplemental open-ended or yokeshaped holder 35 having three pads 36 for engaging the bulb; the said pads 36 are spaced around a little more than 180 of a circle. The holder 35 is mounted on the upper end of a spring-loaded rod 37 which is slidable in the bore 38 of the post 30 and is urged downwardly therein by a helical spring 39 (Fig. 3) contained in an enlarged portion 40 of the bore and confined between a pin 41 on the rod 37 and the shoulder 42 formed by the enlargement 40 of bore 38. Rotation of the holder 35 on the rod 37 is prevented by engagement of a post 43 (Fig. l0) on said holder with a notch in a guide member 44 fixed on the post 30.

At the loading position or station P1, the parts of the head are arranged as shown in Fig. 3 with the spindle 22, post 30 and bulb holder cup 27 held in a lowered position by engagement of the end of an arm 45 of a bell crank having an arm 45 (Figs. l, 4 and 8) with a roller or follower 46 carried by the end of lever 31. At this time, the bulb neck holder 35 is in an elevated position by virtue of engagement of the lower end of the rod 37 with the end of an arm 47 of a lever having also an arm 47'. The cup 27 and neck holder 35 are thus spread apart to receive a bulb 21 which is placed therein, for instance, by transfer mechanism which is represented at 48 by one of a pair of jaws having pads 49 by which the bulb is gripped and carried from a' sealing machine to a position over the cup 27, the narrow upper portion of the bulb passing into the open-ended holder 35. The cup 27 is then raised, and the holder 35 is lowered, to iirmly grip the bulb therebetween and center it therein, the transfer jaws 48 being opened and retracted. This action occurs when the arms 45 and '47, in effect, open like a pair of jaws, the arm 47 of lever 47, 47' being pivoted on a pin 50 (Fig. 4) and the arm 47 being connected to lever arm 45 by a link 51. The lever 45, 45 is pivoted about a pin 52 through a link 53, bell crank 54, link 55 and follower lever 56 which' carries a roller 57 which rides in a track 58 in a cam 59 on shaft 60. The shaft 60 is driven from the shaft carrying the indexing cam (not shown) for the turret 2 so as to synchronize the action of the lever arms 45 and 47 with the indexing of the turret 2 and chain 1.

Toward the end of the indexing period of chain 1 and turret 2, the lever arm 45 is lowered and arm 47 is raised to the positions shown in Figs. 3 and 8 when the cam follower roller 57 (Fig. 4) leaves a high uniform portion 61 of cam track 58 and Vis lowered along 4 the drop portion 62 into engagement with a low uniform portion 63 of the track. At this time, the under surface of arm 45 and the upper surface of arm 47 are at the proper elevation to receive the roller 46 and rod 47, respectively, from respective cam tracks hereinafter referred to, as a head 20 is indexed into position P1. The bulb cup 27 and holder 35 are thus maintained in the separated position shown in Fig. 3 to receive the lamp bulb 21. Then, While the head 20 is still at rest at position P1, the cup 27 and holder 35 are permitted to close upon the lamp bulb 21 by separation of the-arms 45 and 47 when the cam follower roller 57 leaves thelow uniform portion 63 of cam track 58 (Fig. 4) and is raised by the rise portion 64 into engagement with the high uniform portion 61. When this occurs, the rod 37 is released and is moved downward in the post 30 by the spring 39 to carry the holder 35 downward relative to cup 27 to firmly clasp the lamp bulb 21 therebetween. At the same time, the entire head rises to the position shown in Fig. 5 (because of the upward movement of roller 46 with arm 45 due to the action of spring 23) whereby the under ysurface of arm 45 is raised to the 'level of a uniformly level surface portion 66 (Fig. 8)

of a cam track 67 which extends around the path of travel of the chain 1.

The head 20 travels from stations P1 to P17 at the elevation shown in Fig, 5 by virtueI of the constant level portion 66 of cam track 67 engaging the roller 46. It will Aare per se known but are not illustrated herein. Y For instance, at position P6 one (69) of a pair of horizontally extending lead-in wires 69 and 71 (Fig. 3) of the lamp may be bent upward into the axis of the lamp bulb 21 so that a lamp base 70 (Fig. 5) may be threaded over the wire onto the neck ofthe lamp bulb 21 by automatic base threading mechanism located at position P10, the other lead wire 71 being clamped between the base and the bulb neck. The threading mechanism is indicated by a chamber portion 72 in which the base is contained and lowered onto the lamp bulb, as more fully described and claimed in application Serial No. 492,558, filed March 7, 1955, by C. S. Terez; another form of threading mechanism is shown, for example, in Patent 2,748,450, Flaws et al.

Beginning at position P15 and extending around position P32, a cement carried inside the base at the time it is fed to the lamp bulb a-t station P10, is baked and cured by res from groups of burners 73 (Figs. l and 6) mounted over the path of travel of the lamps.

Preparatory to engagement of the chain 1 with the turret 2, and beginning at a location between positions P17 and, P18, the head 20 is depressed to bring it below the level of a fixed base plate or holder 74 (Figs. 2 and 6) which `is supported from an angular bracket 75 carried by the turret 2. For this purpose, there is provided a cam track 76 (Figs. 1, 6 and 8) carried by guide plate 18 and arranged to engage a roller or follower 77 at the front of the bracket 31 on spindle 22. As shown in Fig. 1, the track 76 is reversely curved in a horizontal plane to follow the curvature of the guide rail 3 and plate 18 vwhich guide the rollers 13 on the chain 1 into engagement margin of a circular opening 79 in the base plate 74 (Fig. 2). The level of the head 20 is then maintained by the engagement of the lamp base 70 with base plate 74 as Y Y it travels around the turret 2. However, thecam track 67 is continued around the turret as a constant level portion 80 (Fig. 8) which is spaced somewhat above the roller 46. The purpose of the track portion 80 is that in the event a lamp 21 is missing Yfrom a head, the track 80 prevents movement of the head 20 upward to an elevation sufficiently high to interfere with parts of the turret or with working mechanism, not shown, located at various positions around the turret.

It will be noted that between stations P17 and P21 (Pig. 8) the track 67 has a depressed portion 81 corresponding to track 76 and which follows the path of travel of the roller 46 although spaced slightly above the roller; the purpose of track portion -81 is to prevent vaccidental tipping of the post portion 30 of the head by rotation about pin 32. It will be evident that by depressing the track portion 81 slightly, it may be employed in place of track 76 to depress the head for entry into the turret; however, because of stresses set up in that event by virtue of the moment arm created by the relatively largespacing of roller 46 from the axis of the spindle 22, it is preferred to employ the separate track 76 and roller 77. During the time the lamp is located in the turret 2, its base 70 is also gripped and centered by a pair of jawsV S2 (Figs. 1, Zand 6) which pivot on a pin 83 supported from bracket 75. The jaws are normally closed by a spring 84 extending between arms 85 extending from said jaws, but are opened to receive the lamp base 70 by engagement of Arollers 86 on arms 85 with a stationary cam track 87 (Fig. l) on a fixed annular table 88 concentric with the turret 2.

:As the lamp21 travels about the turret 2, further operations are performed thereon by mechanisms which are per se well known and are not illustrated herein, including locating, trimming, forming and welding or soldering the side lead`wire 71 to the shell of the base 70, and trimming the top lead wire 69 and soldering it to an eyelet 89 at the top of the base.

Preparatory to the head 20 leaving the turret 2,the base holding jaws 82 are opened by engagement of the rollersl 86 with a cam track 90 (Fig. `l) on the table 88, and the head is again depressed to lower the lampbase away from the base plate 74. The lowering of the head 20 occurs when the roller 77 engages a cam surface 91 (Figs. l and 8) and is depressed thereby against the action of spring 23; the roller 46 follows a similar portion 92 of the cam track 67 but is spaced slightly therefrom.

As the head rises by virtue of roller 77 riding'along the rise portion 93 of cam track 91, the roller 46 is guided into the upwardly sloping end portion 94 of a channeled section 95 (Figs. 1 and 7) of the track`67 and onto a horizontal part 96 thereof, whereby the post portion 30 of the head is rotated about pin 32 to bring it and the lamp 21 to a horizontal position (Fig. 7).

As the post 30 reaches a horizontal position at station P49, the roller 77 on the spindle bracket 31 comes over 'astraight rail 97 (Figs. 1, 7 and 8) which prevents the entire head 20 from being accidentally depressed and the roller 46 disengaged from the cam channel 95, in which event the post 20 would beY free to pivot downward about pin 32 so as to lose control of the head. Engagement ofV roller -46 with the base of the channel` 95 is preferably prevented by engagement ofthe base 68 of slot 25 in spindle 2 2 (Fig. 3) with the under surface of the retainer member 24.

As the lamps 21 travel from positions P49 to P62, the coiled tungsten wire filament 97 (Fig. 7) is flashed and its crystal structure set by passing current therethrough at Varying voltages in accordance with a well known schedule. For this purpose the shell of the base 7 0, and its insulated end contact 89, are engaged by springloaded electrical contact members 98 and 99 which are connected to sources of' the proper voltage and are carried by; a 'bracketl 100Y which is mounted. on but electrically insulated from a bracket 1101 supported from the frame 14.

r A 2,910,1e

After the head 20 leaves station P62, 'the post portion 30 thereof is returned to avertical position as the roller 46 rides in a downwardly sloping end Yportion 106l (Fig. l) of the channel corresponding to the other end portion 94. The roller 46V is then controlled by a downwardly inclined portion 107 (Fig. 8) of the cam track 67 and the rod 37 supporting holder 35 engages the upwardly sloping surface 108 of a cam 109 to thereby gradually separate the cup 27 and holder 35 for unloading of the lamp 21 at position P67. u Y.

As the roller 46 rides alongV a horizontal portion 110 of track 67, and rod 37 -rides along a horizontal surface 111of cam 109, the feed roller 46 and rod 37 are brought to the proper elevation to engage the under surface of arm 45 and the upper surface of arm 47, respectively (Figs.,4 and 8)v at the loading station P1. Y

When desired, the levers 45, 45 and 47, 47 may be omitted and their function performed 4by modified portions of the cam tracks 67 and I109 as shown by the dotdash portions in Fig. 9. Thus, the left-hand'end of: the horizontal portion 11,1 of track 109 may be extended across position P1 and be followed by a downwardly sloping surface 113. The horizontal surface 110 of track '67 .may also be extended across position P1, and the righthand end of horizontal surface 66 may be modified to provide a rise portion 114 forming a continuation of the extended surface 110.y lIn this case, the lamp bulb 21 is set into the cup holder 27 with its reduced upper end portion within holder 35 and, upon indexing of the head 20, the roller 46 rides up the cam rise surface 1.14 to raise the cup 27, while the rod 37 rides down the cam drop surface 113 to lower the holder 35 to clamp the lamp bulb. v.

KIn addition to the' functions hereinbefore ascribed to the roller 47 on the spindle bracket 31', it may be employed to operate indicating mechanisms, not shown, to signal the presence of a lamp 21 in the head 20v at the welding and soldering positions and tov prevent operation of those mechanisms in the event a lamp is missing; whether or not the signal is given depends upon the elevation of the roller 77 at that time which, in turn, depends upon whether the head 20 is held down in the position shown in Fig. 6 by engagement of the lamp base 70 with the base plate '74 or whether it is raised to a position such that the roller 46 engages the track 80. Referring 4to Fig. 5, the roller 77 may also be employed to prevent the head 20 from being accidentally depressed tor disengage the roller 46 from the cam surface 66 suiciently to permit tilting forward of the post 30 about pin 32, byprofl viding a rail 112 under the roller 77 and extending from positions P2 to P17.

the lamp axis instead of longitudinally as does the lila-` ment 97 in Fig. 7. In that event, the horizontal tilting feature of the post 30 is not employed; the section 94, 96, 106 of track 67 is removed and replaced by a uniformly horizontal section like that shown at 66 in Fig. 5, and the electrical contacts 98 and 99 on bracket 101 are moved to a position over the path of the lamps.

What we claimas new and desire to secure by Letters Patent of the United States is:

l. "In an electric lamp making machine, a head, means for supporting said head and carrying it along a path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for vertical movement therein, spring means normally urging said spindle upward, a substantially vertically disposed post supported at its lower end from the upper end of said spindle, a rst holder' member xedly mounted .on said post, a second holder member above and in alignment with said first holder member, and spring-loaded vsupport means ar.- ranged to support said second holder from said post in spaced relationship to said first holder and to urge it down# wardly toward said second holder to clamp a lamp bulb` therebetween.

2. lIn an electric lamp making machine, a head, means for supporting said head and carrying it along a path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for vertical movement therein, spring means normally urging said spindle upward, a substantially vertically disposed post supported at its lower end from the upper end of said spindle, a first holder member fixedly mounted on said post, a second holder member above and in alignment with said first holder member, and spring-loaded support means arranged to support said second holder from said post in spaced relationship to said iirst holder and to urge it downwardly toward said second holder to clamp a lamp bulb therebetween, and actuating means for said head mounted adjacent the path of travel of said heads including means to lower the spindle with said post and first holder and to raise said second holder to receive a portion of a lamp bulb therebetween, and means to then release the spindle with said post and first holder for upward movement under the action of said spring means and to release said second holder for downward movement under the action of its said spring-loaded support means to engage and clamp the lamp bulb therebetween.

3. In an electric lamp making machine, a head, means for supporting said head and carrying it along a closed horizontal path of travel including an endless chain conveyor, a turret and looped guide rail means having its ends contiguous to spaced portions of said turret, said around said guide rails, said head comprising a vertically disposed spindle mounted on said chain for vertical movement therein, spring means normally urging'said spindle upward, a substantially vertically disposed post supported at its lower end from the upper end of said spindle, a first holder member mounted on said post, a second holder member above and in alignment with. said first holder member, and spring-loaded support means arranged to support said second holder from said post in spaced relationship to Said first holder and to urge it downwardly toward said second holder to clamp a lamp bulb therebetween, means adjacent a portion of the path of travel of said head along said guide rail for rst effecting relative movement apart of said first and second holders to receive a lamp bulb and for then effecting relative movement toward each other of said holders to clamp the lamp bulb therebetween with a portion of the lamp bulb projecting upwardly beyond said first holder, a base plate member fixedly mounted on said turret to be above and in alignment with said rst and second holders, means effective to depress said head against Ithe action of its said spring means upon advancement of the head from the guide rail to the turret and to then release the head for movement upward to bring a lamp base on the upper end of the lamp bulb into abutting engagement with said base plate member, and means effective to again depress said head upon advancement of the head from the turret to the guide rail to disengage the said lamp base from said base plate.

4. In an electric lamp making machine, a head, means for supporting said head and carrying it along a path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for vertical movement therein, spring means normally urging said spindle upward, a substantially vertically disposed post pivotally supported at its lower end from the upper end of said spindle, a first holder member fixedly mounted on said post, a second holder member above and in alignment with said rst holder member, and springloaded support means arranged to support said second holder from said post in spaced relationship to said first holder and to urge it downwardly toward said second holder to clamp a lamp bulb therebetween, means adjacent a portion of the path of travel of said head for ,30 chain being wrapped around a portion of said turret and first effecting relative movement apart of said iirst and second holders to receive a lamp bulb and for then electing relative movement toward each other of said holders to clamp the lamp bulb therebetween, and means adjacent another portion of the path of travel of said head and eiective to pivot said post to a horizontal position, maintain said post horizontal along a predetermined length of said path and subsequently return the post to a vertical position.

5. In an electric lamp making machine, a head, means for supporting said head and carrying it along a path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for Vertical movement therein, spring means normally urging said spindle upward, a substantially vertically disposed post pivotally supported at its lower end from the upper end of said spindle, a first holder member iixedly mounted on said post, a second holder member above and in alignment with said tirst holder member, and spring-loaded support means arranged to support said second holder from said post in spaced relationship to said first holder and to urge itl downwardly toward said second holder to clamp a lamp bulb therebetween, means adjacent a portion of the path of travel of said head for first effecting relative movement apart of said first and second holders to receive a lamp bulb and for then effecting relative movement toward each other of said holders to clamp the lamp bulb therebetween, and means adjacent another portion of the path of travel of said head and effective to pivot said post to a horizontal position, maintain said post horizontal along a predetermined length of said path and subsequently return the post to a vertical position, and means including Contact members engageable with contacts of a base on the lamp bulb carried by said head as it moves along said predetermined length of said path for supplying electrical energy thereto to flash a filament in said lamp bulb.

6. In an electric lamp making machine, a head, means for supporting said head and carrying it along a closed horizontal path of travel including au endless chain conveyor, a turret and looped guide rail means having its ends contiguous tovspaced portions of said turret, said chain being wrapped around a portion of said turret and around said guide rails, said head comprising a vertically disposed spindle mounted on said chain for vertical movement therein, spring means normally urging said spindle upward, a substantially vertically disposed post support at its lower end from the upper end of said spindle, a first holder member mounted on said post, a second holder member above and in alignment with said first holder member, and spring-loaded support means arranged to support said second holder from said post in spaced relationship to said first holder and to urge it downwardly toward said second holder to clamp a lamp bulb therebetween, means adjacent a portion of the path of travel of said head along said guide rail for rst eifecting relative movement apart of said first and second holders to receive a lamp bulb 'and for then electing relative movement toward each other of said holders to clamp the lamp bulb therebetween with a portion of the lamp bulb projecting upwardly beyond said first holder, a base plate member xedly mounted on said turret-to be above and in alignmentwith said 4first and second holders,'means elective to depress said head against the action of its said spring means upon advancement of the head from the guide rail to the turret and to then release the head for movement upward to bring `a lamp base on the upper end of the lamp Vbulb into abutting engagement with said base plate member, and means effective to again depress said head upon advancement of the head from the turret to the guide rail to disengage the said lamp base from said base plate, and means adjacent another portion of the path of travel of said head along said guide rail and effective to pivot said post to a horizontal position, maintain said post horizontal along a predetermined length of said path and subsequently return the post to a vertical position.

7. In an electric lamp making machine, a head, and means for supporting said head and carrying it along a path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for vertical movement therein, spring means normally urging said spindle upward in said supporting means, a lever arm pivotally mounted on and extending laterally from the upper end of said spindle, a hollow post mounted on the free end of said arm and extending upwardly therefrom, a rst cup-like holder member xedly mounted on said post, a second yoke-like holder member above and in alignment with said rst holder, a rod member supporting said second holder at its upper end and extending through and beyond the lower end of said post, and spring means normally urging said rod downward in said post to eiect engagement of said second holder with a portion of a lamp bulb seated in said rst holder, and

means adjacent a portion of the path of travel of said` path of travel, said head comprising a vertically disposed spindle mounted in said supporting means for vertical movement therein, spring means normally urging said spindle upward in said supporting means, a lever arm pivotally mounted on and extending laterally from the upper end of said spindle, a hollow post mounted on the free end of said arm and extending upwardly therefrom, a lirst cup-like holder member lixedly mounted on said post, a second yoke-like holder member above and in alignment with said rst holder, la rod member supporting said second holder at its upper end and extending through and beyond the lower end of said post, and spring means normally urging said rod downward in said post to'eiect engagement of said second holder with a portion of a lamp bulb seated in said iirst holder, means adjacent a portion of the path of movement of said head and eiective to -rst separate said iirst and second holders to receive a lamp bulb by depressing said spindle against the action of its associated spring means while raising said rod member relative to said post and to then close said first and second holders upon the lamp bulb by permitting said spindle to rise under the action of its said associated spring while releasing said rod to permit its downward movement against the lamp bulb under the action of its associated spring means, and means adjacent another portion of the path of travel of said head and effective to pivot said post to a horizontal position, maintain the post horizontal along a predetermined length of said path and subsequently return the post to a vertical position.

References Cited in the file of this patent UNITED STATES PATENTS 391,171 McDonald Oct. 16, 1888 

